JavaScript

Tiffany Brown writes about Modern Debugging Tips and Tricks for his article on A List Apart. You probably know most of this, but it’s worth a quick scan to see if you are up-to-date on debugging in all the browsers.

CSS

Nicholas Zakas and Nicole Sullivan have released, CSS Lint 2, a tool for linting your CSS. It does a great job of pointing out well-known CSS issues and is easy to using, having a web form, as well as a node-based client.